Nut-lock.



E. JEEEEEY.

NUT LOOK,

APPLICATION FILED MAR. 31, 1909.

" Patented Sept. 29, 1908.

HARRY arrasar, oF LOUISVILLE, KENTUCKY. ,l

No..s99,se9. f

Sp'ecication of Letters'Patent.

Application Aletl March 31, 1908. Serial N 0. 424,394.

To all whom 'it may concern; o

Be it known that I, 'HARRY JEFFREY, a citizen of the United Kentucky, have invented certain neas7 and Ausefullmprovements in Nut- Locks', of Which tion, reference being had therein to the accompanying drawin l his invention re altes to nut locks, and

. 'the primary object of my invention is to prothe flat face 3 on the -of a bolt and vlde positive and reliable means for preventin a nut from becoming disengaged from Va v aving `once been vplaced thereon,

' A further object of my invention is to provide a sim le will not injure the bolt or nutinconnection with which the same is'used. Q

With the above and other objects in view, which will readily appear as the invention is better inderstood, the same consists in the novel construction, combination, an'd arrangement of parts to be presently described .and then specifically pointed out inthe ap# pended clanns.

In -thedrawings, Figure l is a plan of a nut lock constructed in accordance with my invention. Fig. 2 is a side elevation of the same showingthe nut in section, and Fig. 3 is an end View of a-.bol't constructed in ac- 'cordance with my invention.

In the accompanying drawings l designates a bolt Vhaving its threaded end 2 cutaway to provide a flat surface 3 at the end of the bolt. A nut L is adapted-to screw upon the threaded end Qof a bolt 1.

To lock the nut 4 upon the bolt 1, I use a flat strip yofsoft metal 5 such as lead. This strip of 'metal' is placed upon the bolt -W1th one end thereof lying upon the fiat surface 3 of the bolt, .as at 6, and then the nut t'is screwed upon the boltV and upon the soft metal strip 5. mutilating saidstrip and causing the metal thereof to impinge the threads nut and Wedge between said threads' l The strip 5 of metal is extremely thin, and bolt is provided so that the nut may beoiven a good start on, or 'engagement with the threads of the bolt before the nut engagesl with the strip 5. As will be seen by reference to Fig. l of the drawinfrs, the fiat face 3 on the bolt is made consi erably wider than the width of the stripl A States of'America, resid l ing 'at Loulsvill'e, in the county of .Jefferson and State of the following is a specifica'` and inexpensive nutflock that 5 employed, so that, `until -the inner end of the nut rea-ches the unmutilated threads of the bolt, no engagement of the nut withthe strip 5 is had. The strip 5 before being placed on the-bolt is bent or offset so that the outer 'portion thereof lies Hat upon the fiat surface 3 and thus the edges of this outer portion of the strip is Within the confines of the bolt diameter, and the nut threads onto the bolt free from engagement with the strip until the shoulder at 'the inner end ofthe fiat surface 3 is encountered. "By this time,'the nut is in threaded engagement with the lbolt throughout the major ortion of the threads of the nut, and a resu obtains to enable the forcing of the nut onto the thin metal strip, and the compression thereof into the threads of the bolt. By off setting a portion of the strip so as to cause the same to lie fiat on Ithe fiat face 3. of the bolt, and thus providing for the nut obtaining a good hold on the lolt before engaging the stri 5, it will be observed that it is not required) to hold the strip While starting the nut, and,'as the threads of the nut engage the strip atl the inner end of the flat ortion 3 the thrust of the nut is `first directe longitudinally of the bolt so that the strip at this point is compressed into the outer thread of the unrnutilated threads of the bolt and the stripis'held in its alined positi-on,\vith the bolt during further movement of the nut. Thus by simply flattening the bolt on one side at ythe outer end, and shaping the strip so as to have the outer portion thereof lie.

flat on said flat face of the nut, I am enabled to apply my nut lockto the ordinary bolt without specially constructing'the same, and Without injuring the same so as to prevent its use Without the lock.

By interposing the soft metal strip '5 upon one side of the olt, the threads of the nut uponthe opposite side of the bolt will be forced into firm engagement with the threads' of the bolt,'and it will be impossible for any `jarring or vibrating of theybolt to dislodge the nut.

It is apparent that my nut lock is easily and quickly placed in .position and can be "used with bolts and nuts employed for va rions purposes.

Having now described my invention what I claim as new, is

In a nut lock, a bolt provided with a fiat tagt greater purchase.

Patenten sepeeaieos. i

face and :t mit screwing on Said' bolt, c'om 'engagement with the strip at the une'rled bined with :L thin strip of soft metal of a of the liatfuce of said bolt. io Width materially less than the Width of the In testimony whereof I allix my signature flat surface on said bolt and the edges of inthe presence of two witnesses.

5 that portion of the strip which engages the e HARRY JEFFREY.

flat face of the bolt lying Wholly Within the l Vlitnesses: diameter confines of the bolt whereby the' LOUIS F. STEUERLE, mit in screwing on tbe'bolt makes its irst l ELIZABETI'I BEAUL. 

